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The karyotype features and gene  COI  sequence of    Chironomus   heteropilicornis    Wülker, 1996 from the Gydan Peninsula are presented for the first time. Nine banding sequences were determined, eight of them hpiA2, hpiB1, hpiC1, hpiC2, hpiD1, hpiE1, hpiF3 and hpiG1 were previously known from European, Georgian (South Caucasus) and Siberian populations. One new banding sequence for    Ch.   heteropilicornis   , hpiB2, was found. The hpiA2 banding sequence was found in all individuals, and this is its second finding after the Georgian population ( Karmokov 2019 ). The hpiF3 banding sequence was found only in the homozygous state. Additional B-chromosomes are absent. The genetic distances ( K2P ) between    Ch.   heteropilicornis   COI  gene sequence from Gydan Peninsula and Norway are 1.1­–1.3%, and Georgia – 1.8%, much lower than the commonly accepted threshold of 3% for species of genus    Chironomus    Meigen, 1803. The phylogenetic tree for  COI  gene sequences estimated by Bayesian inference showed geographically determined clusters of Norway and Gydan and a separate lineage of the Georgian population of    Ch.   heteropilicornis   . The analysis of karyotype and  COI  gene sequences shows that the population of    Ch.   heteropilicornis    from the Gydan Peninsula has an intermediate position within the    Ch.   pilicornis    group between Georgian, Yakutian and Norwegian populations. The position of    Ch.   pilicornis    Fabricius, 1787 from Canada and Greenland on the phylogenetic tree is discussed.

comparative cytogenetics

﻿Karyotype and  COI  gene sequence of    Chironomus   heteropilicornis    Wülker, 1996 (  Diptera  ,   Chironomidae  ) from the Gydan Peninsula, Russia

﻿Karyotype and COI gene sequence of Chironomus heteropilicornis Wülker, 1996 ( Diptera , Chironomidae ) from the Gydan Peninsula, Russia

Karyotype and COI gene sequence of Chironomus heteropilicornis Wülker, 1996 ( Diptera , Chironomidae ) from the Gydan Peninsula, Russia